Javascript

Question	Answer
DATA TYPES	number, string, Boolean, object, function, undefined
WHICH NUMBERS OFFER PRECISE CALCULATIONS AND WHICH DON'T	precise - integers not precise - fractional numbers
NAME THE ARITMETIC OPERATIONS	addition, substraction, multiplication, division, remainder
NAME THE SPECIAL NUMBERS	positive INFINITY negative INFINITY NaN
NAME THE CHARACTERS THAT NEED ESCAPING	\\ backslash \n newline \t tab \' single quote \" double quote
WHAT ARE TEMPLATE LITERALS	backtick -quoted (`) strings, that can span lines or embed other values `half of 100 is${100 / 2}` - the text inside ${ } will be computed
NAME THE TYPES OF OPERATORS	UNARY - minus, typeof, delete BINARY - aritmetic operators (+ - * / %), comparison operators (<, <=, ==, !=, >=, >, ===, !==), logical operators (&&, \|\|) , "" in, TERNARY -conditional (true ? a : b)
WHICH TWO VALUES ARE EMPTY AND WHAT IS THE DIFFERENCE BETWEEN THEM	null - nothing undefined - something that has not been assigned a value yet
WHAT DOES PROGRAM CONSIST OF	expressions groupped into statements
WHAT DO FUNCTIONS PRODUCE	values and side effects
WHAT ARE BINDINGS AND WHAT IS THE DIFFERENCE BETWEEN THEIR KEYWORDS	- things that hold values - LET has block scope VAR can have both local and global scope CONST has a constant value and local scope
WHAT IS A FUNCTION	piece of program wrapped in a value
NAME BUILD-IN FUNCTIONS	prompt alert console.log confirm
NAME AND DEMONSTRATE LOOPS	for (var i = 0; i < 5; i++) { code } var i = 0; while (i < 5) {code; i++} var i = 0; do {code; i++} while (i < 5);
HOW CAN YOU GET OUT OF THE LOOP	break; - ends the loop continue; - continues from the next value
DEMONSTRATE A SWITCH STATEMENT	let day; switch(day) { case x: code; break; default: code; }
DECLARE A FUNCTION IN THREE WAYS	1: const x = function( ) {}; 2: function x( ) {} 3: const x = (a, b) => { }
WHAT ARE PARAMETERS AND ARGUMENTS	- parameters represent values function needs to work with - arguments are the actual values the function uses when called
WHAT DETERMINES THE VALUE OF A FUNCTION	a return statement
NAME TWO KINDS OF SCOPE	local - let, const global - var
EXPLAIN THE DIFFERENCE BETWEEN FUNCTION NAME AND VALUE	- value is a value as any other - name (binding) can be assigned a new value
WHAT DO YOU CALL A FUNCTION THAT CALLS ITSELF	recursive
NAME DATA STRUCTURES	object - collections of properties { } array - list of values [ ]
ARRAY PROPERTIES	.length
STRING METHODS	.toUpperCase( ) .toLowerCase( )
ARRAY METHODS	.push( ) .pop( )
OBJECT METHODS	Object.keys( ) - return property names as an array of strings Object.assign( ) - copy the properties from one object to another

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	Created by Rachel Rohac about 6 years ago